A locking structure for a fall arrestor

Abstract

This invention relates to a locking structure, and specifically discloses a locking structure for a fall arrestor, comprising a rotating locking component and a safety rope. The rotating locking component includes a turntable and a fixed shaft seat. Two locking members are provided on the turntable, located on one side of the turntable, with the middle of the locking member rotatably connected to the turntable. A locking disc is provided on the fixed shaft seat. The safety rope is wound around the turntable. When the safety rope is pulled, the turntable rotates. When the turntable rotates, the locking disc on the fixed shaft seat continuously strikes and pushes one end of the locking member, causing the locking member to rotate. When the rotation speed of the turntable exceeds a set value, the force of the locking disc on the fixed shaft seat striking and pushing one end of the locking member can cause the rotation of the locking member to exceed the preset value, and the other end of the locking member is blocked by the locking disc, so that the turntable cannot continue to rotate.

Description

Technical Field

[0001] This invention relates to a locking structure, and more particularly to a locking structure for a fall arrestor. Background Technology

[0002] Fall arrestors are safety devices widely used in high-altitude operations. The size and type of fall arrestors used in high-altitude operations vary depending on the specific scenario.

[0003] Generally, fall arrest devices typically consist of a casing, a safety rope, and a locking mechanism. When working at heights, workers must first wear a safety harness. The main body of the fall arrest device is installed on a fixed railing or device. Then, one end of the safety rope of the fall arrest device is connected to the safety harness. When workers are working at heights, the safety rope of the fall arrest device will be pulled out or retracted at a normal speed when walking, squatting, or standing. If a worker accidentally falls, the safety rope of the fall arrest device will be pulled out rapidly. At this time, the locking mechanism will lock, preventing the safety rope of the fall arrest device from being pulled out further and preventing the worker from continuing to fall.

[0004] The working principle of the locking component of a fall arrestor is usually as follows: The safety rope is wrapped around the locking component. When the safety rope of the fall arrestor is pulled out rapidly, the locking component will rotate rapidly along with it. When the locking component rotates rapidly, under the action of centrifugal force, the pawl of the locking component is thrown out. The pawl can lock onto the fixed shell, so that the locking component can no longer rotate. Therefore, the safety rope can no longer be pulled out, thus achieving the locking effect and protecting the safety of the workers.

[0005] However, the locking components of the aforementioned fall arrestor have the following defects: During normal high-altitude operations, the locking mechanism of the fall arrestor does not need to function. Only when a person falls does the rapid pull of the safety rope cause a large centrifugal force to throw out the locking components. Therefore, the locking components of the fall arrestor are basically in a relatively static state. Consequently, the locking components may rust, jam, or become sluggish, making them prone to "malfunction" and posing a significant safety hazard. Summary of the Invention

[0006] The purpose of this invention is to provide a locking structure for a fall arrestor to overcome the shortcomings of the prior art.

[0007] According to one aspect of the present invention, a locking structure for a fall arrest device is provided, comprising a rotating locking component and a safety rope. The rotating locking component includes a turntable and a fixed shaft seat. Two locking members are provided on the turntable, with the locking members located on one side of the turntable and rotatably connected to the turntable at their middle portions. A locking disc is provided on the fixed shaft seat. The safety rope is wound around the turntable. When the safety rope is pulled, the turntable rotates. When the turntable rotates, the locking disc on the fixed shaft seat continuously strikes and pushes one end of the locking member, causing the locking member to rotate. When the rotation speed of the turntable exceeds a set value, the force of the locking disc on the fixed shaft seat striking and pushing one end of the locking member can cause the rotation of the locking member to exceed the preset value, and the other end of the locking member is blocked by the locking disc, so that the turntable cannot continue to rotate.

[0008] In some embodiments, the outer ring of the locking disc is provided with rigid teeth, which are inclined and protruding. One end of the locking member is provided with an arc-shaped portion. When the disc rotates, the rigid teeth will continuously strike and push the arc-shaped portion at one end of the locking member, so that the locking member will rotate.

[0009] In some embodiments, the other end of the locking member is provided with a protrusion. When the rotation speed of the turntable exceeds the set value, the protrusion will get stuck in the concave part formed by the rigid teeth and the locking disc, so that the turntable cannot continue to rotate.

[0010] In some embodiments, the turntable is further provided with an elastic element, one end of which is connected to one end of the locking element and the other end of which is connected to the turntable. The elastic element has an elastic tendency, which enables one end of the locking element to abut against the rigid tooth and the other end of the locking element to move away from the rigid tooth.

[0011] In some embodiments, the locking member has a first hole at one end and a second hole on the turntable. The elastic member is bent, with one end of the elastic member in the first hole and the other end in the second hole.

[0012] In some implementations, a cover plate is also included, which can close onto one side of the turntable.

[0013] In some embodiments, a pivot is provided at the middle position of the locking member, and the locking member is rotatably connected to the turntable through the pivot.

[0014] In some embodiments, a coil spring and a housing are also included, with the coil spring disposed in the housing and the inner coil of the coil spring connected to the other side of the turntable. The housing has a through hole through which one end of the safety rope can extend.

[0015] The beneficial effects of this invention are as follows: In this invention, a safety rope can be fastened to the worker. When no sudden fall occurs, the safety rope is generally pulled out at a relatively slow speed. During this slow pull, the turntable rotates. As the turntable rotates, the locking disc on the fixed shaft continuously strikes and pushes one end of the locking component, causing it to rotate. Due to the slow speed, the rotation angle caused by the strike is small, and the other end of the locking component is not blocked by the locking disc. However, in the event of a sudden fall, the turntable's rotation speed exceeds a set value. The force of the locking disc striking and pushing one end of the locking component on the fixed shaft causes the rotation speed of the locking component to exceed the preset value, blocking the other end of the locking component. This prevents the turntable from continuing to rotate, stops the safety rope from extending further, and stops the worker from falling, thus completing the locking process and ensuring the worker's safety.

[0016] The turntable in this invention rotates continuously, and the locking component on the turntable also rotates. Therefore, the locking component is continuously struck by the locking disc. This invention uses the striking method to achieve locking. Even if the invention is used normally for a long time without falling, it can still avoid the risk of "malfunction" caused by rust or jamming, thus avoiding unnecessary accidents. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the locking structure of a fall arrestor according to one embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the locking structure of the fall arrestor shown, concealing the outer shell of the portion.

[0019] Figure 3 for Figure 2 A schematic diagram of the locking structure of the fall arrestor shown, taken from another direction behind the concealed portion of the outer shell.

[0020] Figure 4 for Figure 1 A schematic diagram of the explosive structure of the locking mechanism of the fall arrestor shown.

[0021] In the diagram, 1-rotation locking component; 11-turntable; 111-locking component; 1111-arc-shaped part; 1112-protrusion; 112-rotating shaft; 113-cover plate; 12-fixed shaft seat; 121-locking disc; 1211-rigid tooth; 1212-concave part; 13-first hole; 14-second hole; 2-safety rope; 3-elastic component; 4-coil spring; 5-outer shell; 51-through hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Figures 1-4 The diagram schematically illustrates the locking structure of a fall arrestor according to one embodiment of the present invention.

[0025] like Figures 1-4 As shown, a locking structure for a fall arrest device includes a rotating locking component 1 and a safety rope 2.

[0026] The rotation locking component 1 includes a turntable 11 and a fixed shaft seat 12. Two locking elements 111 are mounted on the turntable 11, and the locking elements 111 are located on one side of the turntable 11. Figure 2 (Right side in the middle), the middle part of the locking member 111 is rotatably connected to the turntable 11, and the locking disc 121 is fixed on the fixed shaft seat 12. In this embodiment, the fixed shaft seat 12 and the locking disc 121 are fixed, that is, when the locking member 1 rotates, the fixed shaft seat 12 and the locking disc 121 do not rotate. Figure 3 As can be seen, safety rope 2 is wrapped around turntable 11. When safety rope 2 is pulled, it causes turntable 11 to rotate. As turntable 11 rotates, the rope moves from the turntable to the turntable. Figure 2 and Figure 3 As can be seen, the locking disc 121 on the fixed shaft seat 12 will continuously strike and push one end of the locking member 111, so that the locking member 111 will rotate. When the rotation speed of the turntable 11 exceeds the set value (for example, the rotation speed of the turntable 11 is set to N revolutions / min), the force of the locking disc 121 on the fixed shaft seat 12 striking and pushing one end of the locking member 111 can make the rotation angle of the locking member 111 exceed the preset value, so that the locking member 111 will rotate at a larger amplitude.

[0027] Specifically, for example Figure 4 The following example will be used for illustration. Figure 4 In the process of the safety rope 2 driving the turntable 11 to rotate counterclockwise, the locking element 111 on the turntable 11 will also rotate counterclockwise during the counterclockwise rotation of the turntable 11. Figure 4 During the counterclockwise rotation of the upper locking member 111, it is struck and pushed by the locking disc 121, causing the locking member 111 to rotate counterclockwise relative to the turntable 11. When the rotation speed of the turntable 11 exceeds the set value, the force of the locking disc 121 on the fixed shaft seat 12 striking and pushing one end of the locking member 111 can make the rotation angle of the locking member 111 exceed the preset value. At this time, the counterclockwise rotation angle of the locking member 111 is large, and the other end of the upper locking member 111 rotates downward, causing the other end of the locking member 111 to be blocked by the locking disc 121, and the turntable 11 cannot continue to rotate.

[0028] Therefore, when this invention is used on workers, if a worker falls, the rotation speed of the turntable 11 will exceed a set value (e.g., the set rotation speed of the turntable 11 is N revolutions / min), and the other end of the locking member 111 will be locked by the locking disc 121, preventing the turntable 11 from continuing to rotate. This prevents the worker from falling further and protects the worker's safety.

[0029] like Figures 1-4 As shown, a ring of rigid teeth 1211 is formed on the outer circumference of the locking disc 121. The rigid teeth 1211 protrude obliquely towards one end of the locking member 111. A corresponding arc-shaped portion 1111 is integrally formed at one end of the locking member 111. The arc-shaped portion 1111 contacts one end of the locking member 111 and exerts a certain resistance force. Because the arc-shaped portion 1111 is arc-shaped, it does not obstruct the rotation of the turntable 11. When the turntable 11 rotates, the rigid teeth 1211 continuously strike and push the arc-shaped portion 1111 at one end of the locking member 111, causing the locking member 111 to rotate. After the locking member 111 rotates, the arc-shaped portion 1111 at one end of the locking member 111 moves away from the rigid teeth 1211, while the portion at the other end of the locking member 111 moves closer to the rigid teeth 1211.

[0030] In order to achieve the locking function, the other end of the locking member 111 in this embodiment is integrally formed with a protrusion 1112. When the rotation speed of the turntable 11 exceeds the set value, the locking member 111 will rotate significantly. After the other end of the locking member 111 rotates significantly, the protrusion 1112 will be stuck in the concave portion 1212 formed by the rigid tooth 1211 and the locking plate 121. Since the protrusion 1112 and the concave portion 1212 cooperate, and the turntable 11 has a torsional tendency, the turntable 11 cannot continue to rotate. When the turntable 11 cannot rotate, the safety rope 2 cannot be pulled out, thus preventing the worker from falling continuously.

[0031] In this embodiment, as Figure 2 and Figure 4As shown, an elastic element 3 can also be provided on the turntable 11. One end of the elastic element 3 is connected to one end of the locking element 111, and the other end is connected to the turntable 11. The elastic element 3 has an elastic tendency, which allows one end of the locking element 111 to abut against the rigid tooth 1211, and the other end of the locking element 111 to move away from the rigid tooth 1211. By setting the magnitude of the elastic force of the elastic element 3, the preset value of the rotation angle of the locking element 111 can be adjusted. When the elastic force of the elastic element 3 is large, the preset value of the rotation angle of the locking element 111 is also relatively large. That is to say, the locking element 111 needs to have a greater rotation speed to achieve locking. Conversely, when the elastic force of the elastic element 3 is small, the preset value of the rotation angle of the locking element 111 is also relatively small, and the locking element 111 can achieve locking with a smaller rotation speed.

[0032] In order to fix the elastic element 3 and make the elastic element 3 have an elastic torsional force on the locking element 111, in this embodiment, a first hole 13 can be integrally formed at one end of the locking element 111, and a second hole 14 can be integrally formed at the corresponding position of the turntable 11. The elastic element 3 is bent, specifically: the elastic element 3 is "U" shaped, one end of the elastic element 3 can be inserted into the first hole 13, and the other end of the elastic element 3 can be inserted into the second hole 14. The elastic element 3 can have a certain elastic tendency.

[0033] In addition, on one side of turntable 11 ( Figure 2 The right side of the turntable is equipped with a cover plate 113, which can cover one side of the turntable 11 and cover the locking member 111 and the fixed shaft seat 12 on one side of the turntable 11.

[0034] To enable the locking element 111 to rotate, a rotating shaft 112 can be installed at the middle position of the locking element 111, and the locking element 111 is rotatably connected to the turntable 11 via the rotating shaft 112. When the locking element 111 rotates via the rotating shaft 112, as... Figure 4 As shown, the locking member 111 will rotate counterclockwise under the action of the locking disc 121, that is, one end of the locking member 111 will move away from the locking disc 121, while the other end of the locking member 111 will move closer to the locking disc 121.

[0035] In this embodiment, as Figure 4 As shown, the present invention also includes a coil spring 4 and a housing 5. The coil spring 4 can be installed in the housing 5, and the inner ring of the coil spring 4 is connected to the other side of the turntable 11. The coil spring 4 can make the turntable 11 always have a certain torsional force, that is, the safety rope on the turntable 11 always has a tendency to contract. The housing 5 can be integrally formed with a through hole 51, and one end of the safety rope 2 can extend out from the through hole 51.

[0036] In this invention, the safety rope 2 can be fastened to the worker. Unless a sudden fall occurs, the safety rope 2 is typically pulled out at a slow speed. During this slow pulling process, the turntable 11 rotates. As the turntable 11 rotates, the locking disc 121 on the fixed shaft seat 12 continuously strikes and pushes one end of the locking member 111, causing the locking member 111 to rotate. Due to the slow speed, the rotation angle caused by the strike on the locking member 111 is small. The other end will not be blocked by the locking disc 121. In the event of a sudden fall, the rotation speed of the turntable 11 exceeds the set value. The locking disc 121 on the fixed shaft seat 12 strikes and pushes one end of the locking member 111, causing the rotation speed of the locking member 111 to exceed the preset value. The other end of the locking member 111 will be blocked by the locking disc 121, so that the turntable 11 cannot continue to rotate. At this time, the safety rope 2 will not continue to extend, the worker will stop falling, and the locking process will be completed, which can ensure the safety of the worker.

[0037] The turntable 11 in this invention will rotate continuously, and the locking member 111 on the turntable 11 will also rotate. Therefore, the locking member 111 will be continuously struck by the locking disc 121. This invention uses the striking method to achieve locking. Even if the invention is used normally for a long time without falling, it can still avoid the risk of "malfunction" caused by rust or jamming, and avoid unnecessary accidents.

[0038] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A locking structure for a fall arrestor, characterized in that: The device includes a rotating locking component (1) and a safety rope (2). The rotating locking component (1) includes a turntable (11) and a fixed bearing (12). The turntable (11) is provided with two locking elements (111), which are located on one side of the turntable (11). The middle part of the locking element (111) is rotatably connected to the turntable (11). The fixed bearing (12) is provided with a locking disc (121). The safety rope (2) is wound around the turntable (11). When the safety rope (2) is pulled, the turntable (11) will rotate. When the turntable (11) rotates, the locking disc (121) on the fixed shaft seat (12) will continuously strike and push one end of the locking member (111) to make the locking member (111) rotate. When the rotation speed of the turntable (11) exceeds the set value, the force of the locking disc (121) on the fixed shaft seat (12) striking and pushing one end of the locking member (111) can make the rotation speed of the locking member (111) exceed the preset value, and make the other end of the locking member (111) stuck by the locking disc (121), so that the turntable (11) cannot continue to rotate. The outer ring of the locking disc (121) is provided with rigid teeth (1211), which protrude obliquely. One end of the locking member (111) is provided with an arc-shaped part (1111). When the turntable (11) rotates, the rigid teeth (1211) will continuously strike and push the arc-shaped part (1111) at one end of the locking member (111), so that the locking member (111) will rotate. The other end of the locking member (111) is provided with a protrusion (1112). When the rotation speed of the turntable (11) exceeds the set value, the protrusion (1112) will be stuck in the concave portion (1212) formed by the rigid tooth (1211) and the locking disc (121), so that the turntable (11) cannot continue to rotate. The turntable (11) is also provided with an elastic element (3). One end of the elastic element (3) is connected to one end of the locking element (111), and the other end is connected to the turntable (11). The elastic element (3) has an elastic tendency, which allows one end of the locking element (111) to abut against the rigid tooth (1211), and the other end of the locking element (111) to move away from the rigid tooth (1211). The locking member (111) has a first hole (13) at one end, and the turntable (11) has a second hole (14). The elastic member (3) is bent, with one end of the elastic member (3) in the first hole (13) and the other end of the elastic member (3) in the second hole (14).

2. The locking structure of the fall arrestor according to claim 1, characterized in that: It also includes a cover plate (113) that can cover one side of the turntable (11).

3. The locking structure of the fall arrestor according to claim 2, characterized in that: The locking member (111) has a rotating shaft (112) at the middle position, and the locking member (111) is rotatably connected to the turntable (11) through the rotating shaft (112).

4. The locking structure of the fall arrestor according to claim 3, characterized in that: It also includes a coil spring (4) and a housing (5), the coil spring (4) is disposed in the housing (5), and the inner ring of the coil spring (4) is connected to the other side of the turntable (11). The housing (5) is provided with a through hole (51), and one end of the safety rope (2) can extend out from the through hole (51).

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